Stump-pulling apparatus.



H. L` Z|MMERMAN.

STUMP PULLING APPARATUS.

APPLxcATIoN FILED ocr. 24. 1914.

1 ,202, 143.. A PafntedA Oct. 24, 1916.

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HENRY L'. ZIMMERMAN, 0F LONE TREE, IOWA.

sTUivrr-runnrne APPARATUS.

Specification of Letters Patent.

Patented oet. 24, 1916.

Application filed October 24, 1914. Serial No. 868,473.

To all whom t may concern.'

Be it known that I, HENRY L. ZIMMER- MAN, a citizen of the United States,'residing at Lone Tree, in the county of Johnson and State of Iowa, have invented certain new and useful Improvements in Stump-Pulling Apparatus, and I do hereby declare the following to be a full, clear,`and exact description of the invention, such aswill enable others skilled in the art to which it appertains to'make and use the same.

This invention relatesv to improvement in stump pulling apparatus, and more particularly to the mechanism for controlling and actuating the cable carrying drum.

An object in View is the provision of extremely simple and yet eflicient means for engaging and disengaging the drum actuating n mechanism with the drum, and a further obhereinafter specified and claimed.

In the accompanying drawing,y Figure 1 is a view, partly in side elevation and partly inV vertical, central section, of anapparatus embodyingy the features of the present in- Figs. 2 and 3 are detail, fragmentary, vertical, central sectional views, the parts seen in Fig. 2 being in their disconnected position, and in Fig. 3 in their connected. position. Fig. 4 is ra fragmentary `section taken on the plane indicated by' line 4-4 of Fig. 2, parts being seen in plan. Fig. 5 is a vertical section taken on the plane indicated by line 5-5 of Fig. 2. Figs. 6 and 7 are fragmentary, detail views showing the pawl in elevation. Fig. 8 is an end view'of the pawl detached. Fig. 9'is a detail view partly in elevation and partly in section of one of the disk eccentrics detached. Fig. 10 is a detail section taken on the plane indicated by line 10-10 of Fig. 1. Fig. 11 is a plan view of a modified form of key or clutch Fig.'12 is a fragmentary section on taryv section taken on the plane of line 13-13 of Fig. 3. v

l Referring to the drawing by numerals, l indicates the frame of a stump puller having the usual hook 2 adapted to receive an anchoring cable. The upper Vportion of the frame is formed with an aperture 3 coaxial ywith an aperture 4 formedin the lower portion of the frame. A cylinder 5 snugly fits within aperture 3 and is formed with a depending tubularl shaft 6 which extends through `and finds bearing in aperture 4. A

, drum 7 surrounds shaft 6 and is formed at at its upper portion with a squared aperture ture 3' with its finger 9 threaded through a notch 9 formed in the upper portion of frame 1 and opening into aperture 3, the finger being disposed in an appropriate recess in the upper end of drum 7 and thus underhanging the frame 1 so as to prevent vertical escape of the parts.

The cylinder 5 is formed with internal teeth producing an internal ratchet 10 vadapted to be engaged by a key sleeve or ratchet sleeve 11 shaped to snugly fit the ratchet 10. Extending axially through sleeve 11 is a shaft 12 lwhich extends down into shaft 6to a point near the lower end thereof. The upper end of shaft 12 carries, and is preferably formed integral with,

a box 13 adapted to receive a sweep or other operating mechanism. External ratchet teeth'14 extend along and outstand from the'upper portion of a shaft 12. lThe teeth ofrratchet 14 extend longitudinally from the underface of box 13 down to the upper endofshaft 6 and conform in contour to .the inner vratchet ofv sleeve 11.

y t Y A Sleeve 11 is slldingly mounted 0nr ratchet 14 so that said sleeveis locked against independent rotation, but is free to slide from a position Ainengagement with teeth'jlOV topa position above cylinder 5 and out of engagement with said teeth. The lower ends of the teeth ofratchet 14 restl on portion 5, ofcylinder f 5 (which -isy also the upper endof shaft 6) and the teeth are adapted to be lifted therefrom by means and for purposes hereinafter mentioned.

NAt diametricallynopposite points of sleeve 11, integral or appropriately attached arms 15 15 upstand from the sleeve alongside the f sides of box 13 and disposed to be guided in..-

the vertical guideways 16 formed in the sidesV of box 13.` Each arm 15, near its u per end, carries a laterally extending pin 1 and on each pin 17 is eccentrically journaled a kdisk 18 resting edgewise upon the upper surface of frame 1. A bail-like handle 19 has its end portions fixed to disks 18, as by having each end of the bail inserted in a socket 20 on the respective disk and fastened therein by a filling of babbitt or otherwise as preferred.

VThe parts being in the position seen in Fig. 3, and in dotted lines in Fig. 1, the bail 19 is grasped by the operator and swung to the position seen in Figs. 2 and 5 and in full lines in Fig. 1, whereupon the sleeve 11 will have been moved, by the upward movement of pins 17 due to the eccentric mounting of disks 18,' to the unlocked or ldisengaged position with relation to internal ratchet or locking member 10. Inv the course of upward movement of pins 17, the

disks or eccentrics 1'8 shiftl bodily, since the pinsV travelfin .a rectilinear path, so that they move beneath lateral lugs 21, 21, outstanding from box 13. After disengagementof sleeve 11 vfrom ratchet 10, the sleeve 11 strikes and during the final movement of bail 19 slightly lifts4 the box 13 and with it ratchet 14 until the weight of box 13 and the sweep carried thereby is removed from cylinderA 5, the stress of such weight being delivered in opera-tion through ratchet 14 to points 5 of cylinder 5. 7 are thus left entirely free to rotate substantially without frictional resistance. When the parts are to be thrown again into clutch,

lever'19 is moved-from the position seen in Fig. 2 to the positionseenin Fig. 3, during which movement the key sleeve 11 moves VKdownward intoV locking engagement with ratchets "10 and 14, thelugs 21 resting on the disks 18 and transmitting thereto the stress of the weight of box 13 and its sweep whereby any tendency of 'the disks to rise while pivoting on pins 17 owing to frictional resistance of the parts is entirely overcome and the disks are held down against the frame,a and key sleeve V11 is forced downward until it reaches `the final locked position seen in Fig. 3.

TheV upper Hange of drum 7 is formed with a peripheral ratchet 22 engaged by a pawl 23 pivotallymounted toswing in a notch 24 formed inthe kupper portion of frame 1. In operation` the `pawl swings freely and engages .the successive teeth of the ratchet 22 asthe drum rotates so as to prevent back rotation of the drum inthe instance of relaxation of draft pressure on box 13. When, however, it is desired that drum `7 shall be free for reverse rotation, the pawl Jis lifted o ut of the path of the ratchet, and to prevent accidental excessive elevationof the pawl, the same is provided Shaft 6 and drum with a. projection 25 disposed to engage the upper surface of frame 1 and prevent the pawl from moving more than an appropriate `dista-nce to clear ratchet 22, as seen in Fig. 7 .b

the bolt is 4disposed with its short end in aperture 27, the pawl is free to swing as seen in Fig. 6. It is quite important that projection 25 be provided, since it has frequently happened, in actual practice, that the pawl, as employed before the projection 25 was produced, would sometimes be left in a completely inverted position where it was struck bybox 1'3 and either broke the box or some of its mechanism or cracked the frame, or

at least caused the'breaking of the pawl or" its mounting. The possibility of all of 'these objectionable results yis avoided by the provision of projection 25.

The lower flange 29 of spool 7 flares downwardly so as to be out of the plane of the cable engaging the drum, and also t0 provide a clearance Space for the enlarged end of a cable engaging the eye 30, such end being beneath the flange, and yet above the horizontal plane of the outer edge of the flange so as to leave the drum free for lateral removal from frame l without contact of the cable end with the frame.

The operation is obvious, and consists in anchoring the frame and attaching thedrum-carried cable to a stump to be pulled. Sleeve 11 being in engagement with clutches 10 and 14, as seen in Fig. 3, the box 13 is revolved, as by a ,draft-animal operated `sweep lying in box 13. Pa-wl23 being in the position indicated lin Fig. 6, the operation continues until the stump is pulled, the pawl preventingrelease of the cable upon slacking of the .twisting stress. When the stump has been pulled, and the cable is to be attached to another, pawl `23 lis secured inthe released position, as seen in Fig..7, and bail 19 is swung from the position `seen in Fig. 3 to that seen in Fig. 2, whereupon the drum 7 is entirely free for Ipaying out of the cable, and the operation'is repeated. Y

In Fig. 1l is seen Aa sleeve 11c1 similar in structure and function to sleeve 11, and adapted to coperate with inner and outer clutch parts corresponding to parts 14 and 10 but differing in contour to agree with the shape of Ysleeve 11a. The operation is the any contour not ,perfectly circular or cylindrical so as to'A lock shaft 12 to shaft' when the key sleeve is interposed therebetween.

What I claim is l. In a stump pulling apparatus, the combination, with a frame and a drum rotatably carried thereby and having a peripheral ratchet at its upper end, of a pawl pivoted to theupper portion of the frame and normally pendent in position for engaging the ratchet, the pawl being formed with a projection over-hanging a portion of the upper surface of the frame for limiting the possible extent of upward swinging of the pawl for preventing the pawl from being moved into the path of operating means, and means above the frame for operating the drum disposed sufficiently contiguous to the frame to have its path above and at a less distance from the pivot of the pawl than the length of the pawl.

2. In a stump pulling apparatus, the combination, with a frame and a drum arranged therein, of nested shafts extending through the drum, the drum being connected to the outer shaft, means for rotating the inner shaft, a key sleeve slidingly engaging the inner shaft and keyed thereto and adapted to be slid while keyed to the inner shaft to and from a position keyed to the outer shaft, an eccentrically mounted disk connected to the sleeve, and means for moving the disk about its eccentric mounting for shifting the sleeve.

3. In a stump pulling apparatus, the combination, with a frame and a drum arranged therein, of nested shafts extending through the drum, the drum being connected to the outer shaft, a sweep-receiving box'connected to the inner shaft, a sleeve keyed to and slidable along the inner shaft and having an arm extending along-side one side of the box, a disk eccentrically pivoted to the arm and disposed to edgewise engage the frame,

and means for oscillating the disk.

4. In a stump pulling apparatus, the combination, with a frame and a drum arranged therein, of nested shafts extending through the drum, the drum being connected to the outer shaft, a sweep-receiving box connected te the inner shaft, a sleeve keyed to and slidable along the inner shaft and having an arm extending alongside one side of the box, a disk eccentrically pivoted to the arm and disposed to edgewise engage the frame, means for oscillating the disk, and means for maintaining rectilinear movement of the arm when shifted by the disk.

5. In a stump pulling apparatus, the combination, with a frame and a drum arranged therein, of nested shafts extending through the drum, the drum being connected to the outer shaft, a sweep-receiving box connected to the inner shaft, a sleeve keyed to and slidable along the inner shaft and having an arm extending alongside one side of the box, a disk eccentrically pivoted to the arm and disposed to edgewise engage the frame, means for oscillating the disk, a portion of the inner shaft being disposed to rest upon a portion of the outer shaft, and means in the path of the disk for engaging the same and elevating the inner shaft toward the terminus of upward movement ,of the arm.

6. In stump pulling apparatus, the combination, with a frame and a drum rotatably carried thereby, of a shaft extending into the drum, a key sleeve axially shiftable on the shaft and adapted to move to and from a position for locking the shaft in power transmitting relation to the drum, an eccentric for actuating the sleeve, and a lug connected with the shaft and disposed to engage the veccentric for preventing movement of the eccentric in lieu of movement of the key.

In testimony whereof I afx my signature in presence of two witnesses.

HENRY L. ZIMMERMAN.

Vitnesses I-I. C. BUELL, ARCHIE BUTLER.

Copies o! this patent may be obtained for ve cents each, by addressing the Commissioner of'Patents, Washington, D. C. 

